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AZ61A Magnesium vs. AISI 347 Stainless Steel

AZ61A magnesium belongs to the magnesium alloys classification, while AISI 347 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AZ61A magnesium and the bottom bar is AISI 347 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 11
34 to 46
Fatigue Strength, MPa 130
220 to 270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
77
Shear Strength, MPa 150
430 to 460
Tensile Strength: Ultimate (UTS), MPa 280
610 to 690
Tensile Strength: Yield (Proof), MPa 170
240 to 350

Thermal Properties

Latent Heat of Fusion, J/g 350
290
Maximum Temperature: Mechanical, °C 120
870
Melting Completion (Liquidus), °C 600
1430
Melting Onset (Solidus), °C 530
1400
Specific Heat Capacity, J/kg-K 990
480
Thermal Conductivity, W/m-K 79
16
Thermal Expansion, µm/m-K 27
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 62
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
19
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 23
3.6
Embodied Energy, MJ/kg 160
52
Embodied Water, L/kg 980
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
190 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 310
150 to 310
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 46
22 to 25
Strength to Weight: Bending, points 56
20 to 22
Thermal Diffusivity, mm2/s 47
4.3
Thermal Shock Resistance, points 17
13 to 15

Alloy Composition


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Aluminum (Al), % 5.5 to 7.2
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
64.1 to 74
Magnesium (Mg), % 90.3 to 93.9
0
Manganese (Mn), % 0.15 to 0.5
0 to 2.0
Nickel (Ni), % 0 to 0.0050
9.0 to 13
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.1
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0.4 to 1.5
0
Residuals, % 0 to 0.3
0